Dimethyl Sulfoxide → HCID 53961967, compound

1.5 ml (21.1 mmol) of dimethyl sulfoxide were added dropwise over a period of 2 minutes to a solution of 1.0 ml (11.5 mmol) of oxalyl chloride in 20 ml of methylene chloride at -78° C. The mixture was allowed to stand for 10 minutes, after which a solution of 2.54 g (9.32 mmol) of (S)-2-t-butyldimethylsilyloxy-3-cyclohexylpropyl alcohol [prepared as described in step (iii) above] in 12 ml of methylene chloride was added dropwise over a period of 5 minutes. The resulting mixture was then stirred for 20 minutes at the same temperature, after which 6.5 ml (46.6 mmol) of triethylamine were added. The mixture was then allowed to stand for 7 minutes, and the cooling bath was removed. After a further 10 minutes, the reaction was stopped by adding an aqueous solution of ammonium chloride. The reaction mixture was then extracted with diethyl ether. The extract was washed twice with water and once with a saturated aqueous solution of sodium chloride. The organic phase was dried over anhydrous magnesium sulfate, and the solvent was then removed by distillation under reduced pressure, to give 2.55 g (a quantitative yield) of the title aldehyde compound as a colorless oil.

1. waitto stand for 7 minutes
2. customthe cooling bath was removed
3. waitAfter a further 10 minutes
4. additionby adding an aqueous solution of ammonium chloride
5. extractionThe reaction mixture was then extracted with diethyl ether
6. washThe extract was washed twice with water and once with a saturated aqueous solution of sodium chloride
7. dry with materialThe organic phase was dried over anhydrous magnesium sulfate
8. customthe solvent was then removed by distillation under reduced pressure

ORD record

ord-91e3a18272c344fdb85e9542889a1be9

Source dataset

uspto-grants-1996_07

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05534529